Diaper pail cassette



FIG. 1 is a front, top perspective view of a diaper pail cassette showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines shown in the figures represent portions of the diaper pail cassette that form no part of the claimed design and boundaries of the claimed portion of the diaper pail cassette. 

CLAIM The ornamental design for a diaper pail cassette, substantially as shown and described. 